TST-128-03-T-D SAMTEC Connector (Other) In Stock

Name: TST-128-03-T-D
Brand: SAMTEC
SKU: TST-128-03-T-D
Availability: InStock

SAMTEC TST-128-03-T-D is a 56-position dual-row shrouded PCB header with 2.54 mm (0.100") pitch and tin-over-nickel contact finish for reliable board-to-board connections. Square pin male contacts provide robust mating in rectangular contact patterns suited for high pin-count interfaces. Available from authorized distributors with worldwide shipping.

ACTIVEConnectorVerified Jul 2026

Package / Visual Reference

TST-128-03-T-DOther

Quick Facts

Manufacturer: SAMTEC
Package: Other
Pin Count: 56
Lifecycle: ACTIVE
Datasheet: TST-128-03-T-D Datasheet PDF
Category: Connector
Price: From $1.5298(MOQ 1)
Temp Range: -55.0°C to 105.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of TST-128-03-T-D?

56-position dual-row shrouded PCB header with 2.54 mm (0.100") pitch for reliable high pin-count board-to-board connections
Tin-over-nickel contact finish on both mating and termination surfaces provides corrosion resistance and dependable long-term electrical performance
Shrouded housing with rectangular square-pin contact pattern prevents mis-insertion and improves connector alignment during mating

What is TST-128-03-T-D used for?

TST-128-03-T-D is suited for backplane, motherboard, and daughter card interconnections in industrial automation, test and measurement equipment, and embedded computing systems. Its 56-position dual-row 2.54 mm pitch layout supports wide parallel data buses and power-signal combination interfaces in standard PCB designs. The shrouded housing ensures reliable polarized mating during board assembly and field servicing.

What are the specifications of TST-128-03-T-D?

YTEOL	9.1
Body Breadth	0.365inch
Body Depth	0.365inch
Body Length	3.1inch
Connector Type	BOARD CONNECTOR
Contact Finish Mating	TIN (200) OVER NICKEL
Contact Finish Termination	Tin (Sn) - with Nickel (Ni) barrier
Contact Gender	MALE
Contact Pattern	RECTANGULAR
Contact Style	SQ PIN-SKT
DIN Conformance	NO
Filter Feature	NO
IEC Conformance	NO
Insulation Resistance	5000000000Ω
Insulator Color	BLACK
Insulator Material	GLASS FILLED POLYESTER
JESD-609 Code	e3
MIL Conformance	NO
Mating Contact Pitch	0.1inch
Mating Contact Row Spacing	0.1inch
Mating Information	MULTIPLE MATING PARTS AVAILABLE
Mixed Contacts	NO
Mounting Option 1	LOCKING
Mounting Style	STRAIGHT
Mounting Type	BOARD
Number Of Connectors	ONE
Number Of PCB Rows	2
Number of Rows Loaded	2
Option	GENERAL PURPOSE
PCB Contact Pattern	RECTANGULAR
PCB Contact Row Spacing	2.54mm
Polarization Key	POLARIZATION NOTCH
Terminal Length	0.565inch
Terminal Pitch	2.54mm
Termination Type	SOLDER
Total Number of Contacts	56
Package	Other

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
ECCN	EAR99
HTS Code	8536.69.40.40

Where can I find the TST-128-03-T-D datasheet?

TST-128-03-T-D Datasheet Download

Official datasheet from SAMTEC

What are equivalent replacements for TST-128-03-T-D?

No known alternates. Submit an RFQ and our team can suggest alternatives.

Frequently Asked Questions

What contact finish does TST-128-03-T-D use and how does it affect long-term connector reliability?

TST-128-03-T-D uses a tin-over-nickel finish on both mating and termination contacts. Tin provides a solderable, low-resistance surface with a nickel barrier that prevents copper migration, maintaining stable contact resistance across all 56 positions over thousands of mating cycles in industrial and embedded computing environments.

How does the shrouded housing of TST-128-03-T-D prevent mis-mating in PCB assembly?

The shrouded housing fully encloses the 56 square-pin male contacts, acting as a polarization key that guides mating connectors into correct alignment and prevents reversed or offset insertion. This is particularly valuable in field-serviceable assemblies using 2.54 mm pitch dual-row headers where accidental mis-insertion could damage all 56 pins.

Which embedded computing and backplane designs are best served by the TST-128-03-T-D 56-position header?

Designs requiring 56-signal parallel buses at 2.54 mm pitch benefit most, including VME backplanes, PLC rack connectors, single-board computers, and test fixture boards. The dual-row 3.1-inch body length accommodates wide I/O bundles, and the rectangular square-pin contact style ensures mechanical compatibility with standard 0.100-inch pitch mating sockets.

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AvailabilityIn Stock

Reference Price (USD)

From $1.5298

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
1+	$4.4500	$4.45
100+	$3.6700	$367.00
500+	$2.8900	$1445.00
1000+	$2.4989	$2498.88
2500+	$1.9928	$4982.02
5000+	$1.5298	$7648.80

pcs

Unit price: $4.4500 · Total: $4.45

In Stock · 24h Response · Worldwide Shipping

Direct Contact

WhatsApp Inquiry Email RFQ

Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

Response within 24 hours · Worldwide shipping

“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”

James Wright

Supply Chain Director, CircuitPro Ltd, UK

TST-128-03-T-D SAMTEC Connector (Other) In Stock

What are the key features of TST-128-03-T-D?

What is TST-128-03-T-D used for?

What are the specifications of TST-128-03-T-D?

Compliance & Regulatory

Where can I find the TST-128-03-T-D datasheet?

What are equivalent replacements for TST-128-03-T-D?

Frequently Asked Questions

What contact finish does TST-128-03-T-D use and how does it affect long-term connector reliability?

How does the shrouded housing of TST-128-03-T-D prevent mis-mating in PCB assembly?

Which embedded computing and backplane designs are best served by the TST-128-03-T-D 56-position header?

Related Guides

CSD87313DMS Synchronous Buck Power Stage Design Guide

STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection

C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC

STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security

Why Buy from FindMyChip

About SAMTEC

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